Automatic merge from submit-queue (batch tested with PRs 51839, 51987)

Disable rbac/v1alpha1, settings/v1alpha1, and scheduling/v1alpha1 by default

**What this PR does / why we need it**: Disables alpha features which were previously enabled by default. Also changes tests which relied on these alpha features being enabled by default.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #47691

**Special notes for your reviewer**:

**Release note**:

```release-note
Fixed a bug where some alpha features were enabled by default.